Astronomers noticed a strange cloud over Mars: it is visible even from terrestrial telescopes

This is stated on the website of the European Space Agency.

A cloud of white color, 19 km wide, is located above Aria's mountain from mid-September. Despite its location, this atmospheric feature is not related to volcanic activity: researchers believe that in reality the object is an orographic cloud.

The cloud, most likely, consists of water ice and arises due to the interaction of the leeward slope of the volcano with atmospheric currents - an effect that occurs in mountainous regions on Earth. Astronomers note that the appearance of the cloud varies during the Martian day, rising in the morning.

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